Discontinued Operations Assets Held for Sale and Business Divestiture - Additional Information (Detail) $ in Thousands			12 Months Ended			24 Months Ended
	Dec. 10, 2012 USD ($) facility	Dec. 10, 2012 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($)	Jan. 30, 2015 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges			$ 0	$ 0	$ (72)
Severance Costs			$ 964
ASC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of operated facilities | facility	3
Discontinued Operations, Held-for-sale or Disposed of by Sale | Repair Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds							$ 1,422
Asset impairment charges					354
Severance Costs					685	$ 959
Severance costs paid				$ 274	6
Discontinued Operations, Held-for-sale or Disposed of by Sale | ASC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from divestiture		$ 8,100
Escrow deposit	$ 980	$ 980
Pre-tax gain from divestiture					$ 3,980